Valve-truing tool.



F. 0. ALBERTSONJ VALVE TRUING TOOL.

APPLICATION FILED APB.7, 191a.

Patented Feb. 17,1914.

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I valves.

VALVE-TRUING TOOL.

1,087,625. Specification of Letters Patent.

Application filed April 7, 1913 Patented Feb, 17, 1914. Serial No. 759,537.

To all whom it may concern Be it known that 1, Frame 0. ALnnRTsoN, a subject of the King of Sweden, and a resident of Sioux City, in the county of Voodbury and State of Iowa, have invented certain new and useful Improvements in Valve- Truing Tools, of which the following is a specification.

My invention relates to means for truing valves and the like.

The gas engines in most common use are equipped with valves, the faces of which are beveled at angles of 30, 45 or 60 degrees, and are adapted to coact with correspondinglyshaped seats. Owing to the constant movement of the valves against their seats, and the action of the burnt gases upon the the beveled peripheries of the latter become scored; and as a result of these evils, t the valves are no longer truly seated. I

Fig. 6 is a horizontal section taken on the line 66 of Fig. 1.

Referring now to the illustrations, 7 is a supporting rod, preferably cylindrical, upon which are mounted brackets, 8 and 9, ad: justable longitudinally of the support, 7, l on any portion of which they may be secured by turning the set-screws, 10 and 11, respectively, into firm engagement with the support. Alinement of the brackets is pre served by keys, or pins, as 12 and 13, carried by the collar portions of the respective brackets and slidably engaging a channel, or key-way, 14, extending the length of the support.

On the upper end of the support is secured a bracket, 16, provided with an upwardly-extending bearing, 17, preferably integral with the bracket. The bracket is drilled and the reduced end of the support, or tenon, 15, driven into firm engagement therewith.

Upon the bracket, 16, is a collar, 18, preferably hexagonal in shape, and eccentrically mounted for rotation upon the bearing, 17. The upper face of the collar is concave, or

The structure presented by Noonan, in United States Patent Number 926,957, suffers chiefly from the inaccurate means provided for adjusting the truing element to the face of the valvedisk, inasmuch as the blade is pivotally secured to the tool body,

and its angle altered by a setscrew. This conical, as illustrated. Secured at equal inseelns impracticable, as the blade cannot be tcrvals, in notched portions around the colset accurately at the desired angle. Indeed, lar, are radial blades, 19, 20 and 21, the cutthe operator cannot obtain accurate results, ting edges thereof being inclined, respecwith certainty, by endeavoring to adjust the tively, at 45, 60 and 30 degrees. The blades cutting edge of the blade parallel with the may be secured in any suitable manner, but

irregular surface which it is desired to true.

It has been the primary object, therefore, of the present invention, to produce a device of this character, provided with reliable, yet simple means, for adjusting the truing element to the different angles required.

With this and other objects in view, the invention will be fully understood from the following description, reference being had to the accompanying drawings forming a pa rt of this specification, in which like charactors of reference indicate corresponding parts throughout the several views, of which,-

Figure 1 is a front elevation of a device constructed in accordance with my invention; Fig. 2 is a vertical section of the same, a valve being represented therein; Fig. 3 is a side elevation of the same; Fig. 4 is a plan view of the same; Fig. 5 is a horizontal sec tion taken on the line 55 of Fig. 1; and

preferably as illustrated in Fig. 2, in which 22 is a machine-screw extending upwardly through the collar and screwed into the base of the truing blade.

A vertical notch, 23, in the side of the bracket-bearing, 17, serves as a guide-way for the valve-stem. This notch is alined with a similar notch in the bracket, 8.

In Fig. 2 is represented a valve placed in the guide-ways in position for truing. The lower end of the valvestem rests upon a vertical thumb screw, 25, threaded into the bracket, 9. crewing and unscrewing the thumb-screw accordingly raises and lowers the valve and thus the depth of the cutting is regulated. Cross-bars, 26 and 27, provided to prevent lateral displacement of the valve-stem, are secured, respectively, to the brackets 16 and by thumb-screws, 28 and 29. By virtue of this construction, it is now clear that the device may be readily adjusted to accommodate valve-stems of various diameters; that a valve-stem, when properly I adjusted, is rotatable within the guidebrackets; parallel to the support and eccentric to the collar.

The collar is adjustably and removably secured to the bracket, which may be accomplished in any suitable manner. In the embodiment selected for illustration the bracket has four faces conforming to the contour of the collar. On one face of the bracket is a lock-plate, 30, secured thereto by a screw, 31, and extending upwardly embraces the collar. The inner side of the lock-plate should be roughened, or the upper end crimped inwardly, as illustrated, so as to securely engage, and thereby prevent longitudinal displacement of the collar.

Obviously the member which carries the radial blades may be of any suitable shape and size, the only requisite being that it be rotatable eccentrically to the axis of the valve-stem. The number and angle of the truing members may also be varied without departing from the spirit of the invention.

In the practical operation of my novel device, the bevel angle of the valve-disk being predetermined, the look-plate is loosened, the collar then rotated until the blade of the proper angle is brought into the relative position of the blade 19, in Figs. 1 and 2, and the clamp, 30 replaced. The valve is then placed in the position shown in Fig. 2, and the thumb-screws 2S and 29 tightened sufficiently to eliminate play of the valve-stem and yet permit the latter to rotate within the guides. The abutment screw, 25, is turned sufficiently to engage the lower end of the valve-stem without raising the valve-disk from engagement with the truing blade. Relative movement between the valve and the tool may be imparted in any suitable manner, the most convenient of which seems to be to rotate the valve.

The tool may be gripped in a vise during the operation.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is,-

1. A portable device of the character described comprising a supporting rod carrying fixed and movable brackets provided with valve-stem guide-ways; an adjustable "otatable member mounted upon the fixed bracket eccentrically to said guide-ways; and radial blades carried by said rotatable member.

2. A device for truing valves and the like comprising a supporting rod provided with valve-guide-brackets, mutually alined; a

- shank upon one of said brackets; a rotatable eccentrically upon said blades carried by locking the colcollar mounted shank; radial valve-truing said collar; and means for lar to the shank.

3. A device for truing valves and the like comprising in combination a supporting frame; a bracket carried by said frame and provided with a valve-stem guide-way; an adjustable rotatable member carried by said bracket eccentrically to said guideway and armed with radial truing blades; and a second bracket, provided with a valve-stem guideway alined with the guideway of the other bracket, said second bracket being adjustably secured to the supporting frame.

4t. A device for truing valves and the like comprising a supporting rod justable brackets provided with alined valve-stem guide-ways; a fixed bracket provided with a guideway to enact with the first said guide-ways; a shank upon the fixed bracket; a flat-faced collar mounted upon said shank and eccentrically to the guide-ways; radial blades carried by said collar; and a lockplate removably secured to the fixed bracket and adapted to embrace the fiat faces of the collar, whereby rotation of the latter is prevented.

5. The combination with a valve-supporting frame and adjustable guide-brackets carried thereby, of a fixed guide-bracket at one end of said frame and provided with a shank; a member mounted for rotation upon said shank and eccentrically to the guide-brackets; radial valve-truing means carried by said member; and means for locking the latter upon the shank.

In witness whereof I have hereunto set my hand, this 5th day of April, 1913, in the presence of two subscribing witnesses.

FRANS O. Al'iBERTSON.

Witnesses:

G. WV. BARR,

JAMES WALLACE.

flopiea of this patent may be obtained for five cents each, by addressing the Commissioner of I'atentt,

Washington, D. C.

carrying ad- 

